Nuclear Engineer - 2026 New Graduate

• Ownership of Nuclear
  d
  esign
  and analysis
  , examples:
   
  • Shielding: Transport, Operational, Self-Activation and environmental Activation, Waste Categorization, working with both customer and regulatory requirements
     

  • Run coupled neutronics and thermal calculations to refine the thermal model in various scenarios
     

  • Mechanical:
    Assess damage effects
    and bulk material properties changes
    due to
    high flux on ceramics and metals inside the core
     

  • Neutronics:
    Develop control schemes and design control systems
    using transient simulations
    to finalize source sizing and detector selection
     

  • Fuel and Waste:
    M
    odel burnup distribution,
    design burnable absorber,
    and perform criticality assessments
    for transport and waste facility compatibility
     

• Develop requirements for
  hardware
  systems, structures, and components
   
  • Create and manage a Bill-Of-Materials (BOM).
     

  • Find and develop suppliers for all components.
     

• Own subassembly design, manufacturing, and test schedules. 
   
   

• Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication. 
   
   

Required Qualifications & Skills 

• Bachelor’s degree
  in nuclear engineering or equivalent degree
  from accredited institution
   

• P
  roficient in at least one of the following
  programming
  languag
  es
  :
  Python
  , C++,
  C#
  , or another scientific computing language
   

Desired Qualifications & Skills  

• Self-motivated with strong organizational, written, and oral communication skills
   
   

• Competency in distributed software development process
   

• Hands-on experience
  designing
  hardware
  and/or performing
  tests
   

• Related experience
  with
  OpenMC
  , Serpent, MCNP, MOOSE, BISON, RELAP, CFD, Pronghorn, GRIFFIN, or other nuclear software packages  
   

• At least 1 year of software development experience:
  • C, C++, or Python development experience is preferred.

  • Prior use of code repositories, unit testing, performance benchmarking, and software review / release processes.
     
     

  • Familiarity with good documentation practices and implementation of style guidelines.

Additional Requirements:

• Must be willing to work extended hours and weekends as necessary to accomplish our mission.
• Must work 100% onsite at El Segundo HQ.

Total Compensation and Benefits

Radiant's new hire compensation package includes base salary, substantial equity grants, and comprehensive benefits. Total compensation and level are determined through a holistic evaluation of your interview performance, experience, education, and qualifications. 

Benefits and Perks for Eligible Employees:

• Stock: Substantial incentive stock plan for all full-time employees.
• Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
• One Medical: Sponsored memberships for employees and their dependents.
• Vision: 100% top tier plan coverage + 50% for dependents.
• Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
• Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
• 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
• Daily catered lunch. Free snacks and drinks.
• Flexible PTO policy. Remote workday allocation.
• Company and team-bonding events, happy hours and in-person camaraderie.
• Beautiful El Segundo headquarters close to the Pacific Ocean.

We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.

Unfortunately, we are unable to provide visa sponsorship at this time.

This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.